That a bishop should not be ordained except by many
bishops, but if there should be necessity he may be ordained by
three.

Bishop Aurelius said: What says your holiness on this
matter? By all the bishops it was answered: The decrees of
the ancients must be observed by us, to wit, that without the consent
of the Primate of any province even many bishops assembled together
should not lightly presume to ordain a bishop. But should there
be a necessity, at his bidding, three bishops should ordain him in any
place they happen to be, and if anyone contrary to his profession and
subscription shall come into any place he shall thereby deprive himself
of his honour.

Notes.

Ancient Epitome of Canon
XIII.

At the bidding of the Primate even three bishops can
make a bishop. But whoever goes counter to his profession, and
subscription, is deprived of his honour by his own judgment.